We are creating workflows that will be published to a gallery but our corporate policy prevents the creation of a service account. The key and code will need to be regenerated every 90 days. As more and more workflows are created, we will need to update each one.
My thought is: is there a way to create a macro that will go grab the access and secret keys from a central location maintained by our team and populate them so that workflows can run regardless of an update?
I also saw a similar posting about turning the workflows into analytic apps and credentials would be entered at the time they run but no screenshots were presented.
Has anyone successfully dealt with this? (see screenshot for fields I'd like populated)

Thank you so much!
Heather